How one supplement company cost a short seller $1B

See the legendary live feud between Bill Ackman and Carl Icahn over Herbalife

In 2013, the two fought on live television in what may be one of the most-watched business television segments of all time. At one point, Icahn called Ackman a "liar" and a "crybaby," while Ackman told Icahn he was a dishonest guy.

Tesla short sellers benefited from the company's poor performance in 2025

Tesla was widely considered the most-shorted stock until 2024, despite consistent short-seller losses. Between 2016 and 2020, short sellers reportedly lost more than $11B as Tesla's stock price continued climbing. However, long-held short positions began paying out in 2025 as Musk's foray into politics and his eventual feud with President Trump hurt Tesla's stock performance. In 2025, Tesla short sellers made more than $10B.

Hear why one short seller thinks short selling is now more important than ever

Carson Block runs an investment research firm and hedge fund, Muddy Waters Research and Muddy Waters Capital. Block is known for being an activist investor focused on identifying fundamental business problems that might cause a stock to be overvalued. Block says a decrease in investigative financial journalism, deregulation, and less oversight of businesses overall have increased the scope and scale of fraud, making short sellers that suss out overvalued stocks incredibly important.

How one man placed the first short against the Dutch East India Company

Isaac Le Maire, a Dutch businessman and cofounder of the Dutch East India Company, is said to be history's first short seller, betting against the Dutch East India Company's stock price. Le Maire, who had been fired from the spice trading company over an unclear financial dispute, began spreading false rumours about the company to encourage people to sell their stock in order to tank its value.

PetSmart and Hilton are among 10 of the most famous leveraged buyouts in history

Some of the most famous leveraged buyout deals include Blackstone's 2007 acquisition of Hilton Hotels, in which Blackstone took the then-public company private and then returned it to the public markets in 2013. A British PE firm bought PetSmart for $9B in 2014—one of the most expensive leveraged buyouts since 2007.

Many hedge funds use short selling as an alternative investment strategy to offset risk

Hedge funds typically use a "long-short" investment strategy—where funds diversify by investing in a mix of long positions and short positions—to balance risk and maximize profits. Including short positions gives hedge funds some protection against downturns in the market, although the strategy can have uncapped losses for investors.

Bear raiding is a manipulative tactic to bring a stock price down—and part of why short selling can be controversial

Bear raids occur when short sellers use manipulative tactics—like spreading false rumors or coordinating trades—to artificially drive down a stock's price and profit from short positions. Although bear raids are an illegal form of market manipulation, they can spook investors, prompting large selloffs of shares and causing a company's value to plummet. As a result, investors may be hesitant to invest in the company in the future, creating a feedback loop of stock downturn.

How Jim Chanos used a Wall Street Journal article to uncover Enron's fraud

After seeing an article in the Wall Street Journal about the unclear financials of energy companies, Chanos' firm Kynikos Associates began investigating the finances and accounting of Enron, an American energy corporation that was the seventh-largest company at the time. The firm ended up making $500M on its short positions against Enron.

Hear how the Piggly Wiggly grocery store founder attempted to squeeze short sellers by cornering the grocery store's stock

Founded in 1916 in Memphis, TN by Clarence Saunders, Piggly Wiggly was the first modern grocery store with aisles for customers to shop for themselves. In 1922, investors placed short positions, sensing that the stock may be overvalued after several Piggly Wiggly franchises in the Northeast went bankrupt. Saunders attempted to squeeze short sellers by taking out $10M and buying up nearly 99% of all available Piggly Wiggly stock. Ultimately, the fiasco ended with Piggly Wiggly's stock being permanently banned from the New York Stock Exchange and Saunders leaving Piggly Wiggly and filing for bankruptcy.

A landmark hedge fund court case once reshaped high finance

Hedge fund traders tied to insider trading by probing prosecutors are relatively rare. When billionaire hedge fund legend Steve Cohen, founder of SAC Capital, pleaded guilty to trading on inside information, Wall Street trembled. The outcome of the case remains a cautionary tale for traders today.

In 2008, the 'Big Short' mastermind Michael Burry made more than $700M

Before the 2008 housing crisis, Burry used credit default swaps to bet against subprime mortgage-backed securities that fueled the 2008 housing crisis. His firm made more than $700M for its investors, and Burry made more than $100M in personal profits.

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

WellHub is a startup serving roughly 4 million people in 11 countries, providing broad wellness benefits to employees

Valued at $2.4B in 2025, the company helps workers get gym access and meditation apps, in addition to basic healthcare. Listen to the founder of the company, Cesar Cevalho, explain how he scaled the company with Jeff Berman.

One $100 investment in the Medallion Fund skyrockets over time

The Medallion Fund, the famously secretive quant fund that invests billions of dollars for the partners and employees of a single firm with a legendary track record, has trounced the market for more than three decades. While its results are an extreme outlier, this visualization showcases the power of compound interest.

How a failed investment bank almost became the name of a whiskey line

In the fallout of the Great Recession of 2008, Barclays bought several assets from the failed investment bank Lehman Brothers in a fire sale and maintained the company's trademark, despite the bank's collapse. Tiger Lily Ventures attempted to launch a whiskey line parodying the name, but the product was rejected in court due to questions over Barclays' maintenance of the trademark.

Soybean oil fraud almost decimated American Express in 1963

A New York commodities trader who had defrauded the American government over uninspected meat for school lunches, Anthony "Tino" De Angelis, used American Express warehouses to sell soybean oil. However, Angelis had actually filled the tanks with water and placed just enough soybean oil on top of the tanks to pass inspection. American Express was liable for many of the tanks and its stock faced a huge downturn, opening the door for a then 33-year-old Warren Buffett to make his first purchase in the company.

Mark Zuckerberg was nearly fired from his own company after refusing to sell Facebook to Yahoo for $1B

In 2006, Yahoo tried to buy Facebook for $1B. Despite enthusiasm from nearly all of Facebook's management team and board (which included PayPal cofounder and famed investor Peter Thiel at the time), then 22-year-old Zuckerberg turned down the offer, insisting that Yahoo undervalued the company and didn't have a clear vision for the future. Zuckerberg has since said he regrets not being clear about his intentions to grow the company with his team before the Yahoo bid, as almost all of the company's management team left after he turned down the offer.

A Saudi Arabian sovereign wealth fund divested from LIV Golf after pumping more than $6B into the PGA's controversial rival

The Saudi Arabian Public Investment Fund was the primary backer of LIV Golf, and at one point held more than 90% of the league's ownership stake. Famous golfers, like the three-time Masters' champion Phil Mickelson, criticized the league for "sportswashing" Saudi Arabia's questionable human rights record.

Warren Buffett turned a struggling textile mill into Berkshire Hathaway

With Class A shares trading at over $700K per share, Berkshire Hathaway's high stock price reflects Buffett's decades of long-term investing, major acquisitions, and a philosophy that has reshaped modern finance.

The CEOs of the two top prediction markets have a fierce rivalry

Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan are both billionaire CEOs of the top two prediction markets—but they don't exactly get along. For instance, Mansour reportedly does not say the word "Polymarket" out loud, referring to it as the "non-American, unregulated platform."

It's difficult for individual investors to purchase IPO shares

Although the process of going public means the general public can invest in a company, the initial investment period is different. Before individual investors get in on the action, investment bankers sell the shares to larger financial institutions who can afford the asking price and risk associated with an IPO.

SpaceX's S-1 or 'prospectus' revealed many previously unknown details about the company, including its unprofitability despite doing $18.7B in revenue in 2025, exactly how many voting shares Elon Musk will have in the company (roughly 85%), and more.

Read about the National Labor Relations Board case against Bridgewater Associates

In 2016, The New York Times reported about sexual harassment claims at the hedge fund, which uncovered a large-scale case from the National Labor Relations Board over Bridgewater's employees' contracts. The NLRB challenged their intense confidentiality agreements, but the settlement was ironically deemed confidential.

Steve Bannon was made CEO of the company in charge of Biosphere 2 in 1994

After providing $200M to launch and upgrade B2 before its second mission, billionaire philanthropist Ed Bass appointed the future political strategist and then financial consultant to help find new investments and bring costs under control. Fearing interference from non-science experts, Biospherians from the first mission vandalized the project.

Hikma v. Amarin is a case the Supreme Court is hearing in 2026 that could impact how much you ultimately pay for prescription drugs

The case explores the liability of a generic drug maker for patent infringement. Hikma Pharmaceuticals launched a generic for Amarin Pharma's Vascepa (a fish oil drug), carving out a still-patented use and instead explicitly selling its product for another unprotected use. But Hikma was sued for its marketing materials that still alluded to the patented indication without outright referencing it.

Bill Hewlett and Dave Packard are known for creating the 'founding' Silicon Valley company Hewlett-Packard

During the company's early years, Hewlett and Packard established a management approach called "the HP Way." The approach, which was considered radical at the time, helped shape the way Silicon Valley is run today.

Raising the price of a Peloton bike increased the company's early sales—and that's part of why the bikes are so expensive

The original Peloton stationary bikes sold for about $1.2K, but Peloton founder John Foley said that price point made consumers skeptical of the product's quality. After increasing the price of a bike to $2K, Foley said people started to believe it was a quality product, and sales soon increased.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

Read a deep dive on the 'all-purpose healing' peptide BPC-157.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

Telehealth demand for GLP-1s for weight loss is booming as consumers seek easier access.

When a Paris department store hesitated to sell Estée Lauder's perfume, she 'accidentally' broke a bottle, causing the smell to spread throughout the store and shoppers to start asking to buy the scent.

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

A vending machine run with Anthropic's AI went out of business after it was convinced to give away items for free and sell a video game console.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

After her fellow cult members tried to kill her with an LSD-infused hamburger, one member of the Manson Family, the murderous cult led by Charles Manson, decided to testify against the group's leader.

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

Sears sold DIY house kits starting at $600 in its famous catalog from 1908 through the 1940s, resulting in roughly 10,000 'Sears and Roebuck houses' being built.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

Exploring the Larry Bird punch that almost changed March Madness

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

Poison ivy's rash-causing compound is found in the plant's roots, stem, and leaves—so coming into contact with any part of the plant can lead to rashes for the 85% of people who are allergic to it.

The first image of a black hole was captured by creating an Earth-sized virtual observatory from a network of eight radio telescopes.

See how Ebola tore through Guinea, Sierra Leone, and Liberia in 2014-2016.

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.